LINNAEAN LICHEN NAMES AND THEIR TYPIFICATION

The typification of the 109 names of lichens described by Linnaeus is discussed; 50 lectotypes, 24 epitypes and eight neotypes are newly des ignated. All written sources of which we are aware have been consulted , including original manuscripts. The relevant specimens in Linnaeus' lichen herbarium (LINN) have been carefully evaluated. All these eleme nts are discussed, as well as the validity of previous typifications. Most names (72.5%) can be typified in a way that avoids any changes in their current interpretation, but proposals for conservation are nece ssary for 17 species names if their current usage is to be upheld. Six Linnaean names which have not been in use for a long time are treated as species non satis notae since no original material has been traced and the protologues are too vague to allow the species names to be id entified with certainty. They will be proposed for rejection under Art . 56 of the Tokyo Code together with five names-lichen cornucopioides, Lichen fahlunensis, L. plicatus, L. rangiferinus var. sylvaticus and Mucor lichenoides-the typification of which has unfortunate nomenclatu ral consequences.